19 August 2009 Phase-induced amplitude apodization (PIAA) coronagraph testing at the High Contrast Imaging Testbed
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We present the current status of our testing of a phase-induced amplitude apodization (PIAA) coronagraph at the Jet Propulsion Lab's High Contrast Imaging Testbed (HCIT) vacuum facilities. These PIAA optics were designed to produce a point-spread function containing a region whose intensity is below 10-9 over a 20-percent fractional bandpass, comparable to the requirements for direct imaging of exoplanets from space. The results presented here show contrast levels of 4×10-7 in monochromatic light, with an inner working angle of 2.4 λ/D. The instrumentation is described here, as well as the testing procedures, wavefront control, and results.
© (2009) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Brian Kern, Ruslan Belikov, Amir Give'on, Olivier Guyon, Andreas Kuhnert, Marie B. Levine-West, Ian C. McMichael, Dwight C. Moody, Albert F. Niessner, Laurent Pueyo, Stuart B. Shaklan, Wesley A. Traub, John T. Trauger, "Phase-induced amplitude apodization (PIAA) coronagraph testing at the High Contrast Imaging Testbed", Proc. SPIE 7440, Techniques and Instrumentation for Detection of Exoplanets IV, 74400H (19 August 2009); doi: 10.1117/12.826988; https://doi.org/10.1117/12.826988

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